Mexico City , Mexico -LRB- CNN -RRB- -- The death toll from heavy floods and mudslides in Mexico increased Tuesday to 41 , a government agency announced .

Most of the deaths -- 30 -- have occurred in eastern Michoacan state , on the central Pacific coast . The state attorney general 's office released a list of the deceased Tuesday .

Another 12 people are missing after mudslides from two large hills , Michoacan Gov. Leonel Godoy said Tuesday .

The remaining 11 deaths resulted from a mudslide Saturday near the small town of Temascaltepec in neighboring Mexico state .

Interior Secretary Fernando Francisco Gomez Mont has declared a state of natural disaster for the Michoacan cities of Angangueo , Ocampo , Tiquicheo de Nicolas Romero , Tuxpan and Tuzantla . The declaration makes those cities eligible for money from the federal natural disaster fund .

The death toll in Michoacan had been 27 until three additional bodies were discovered Tuesday .

Godoy said officials are focusing on three tasks : searching for anyone who is alive , recovering bodies and removing boulders and downed trees . Officials are under pressure to act quickly , he said , because another cold front with more possible rain is expected within the next few days .

More than 3,500 Michoacan residents are homeless , the state government said on its Web site .

In addition to Michoacan and Mexico states , unusually heavy rain in the past week also flooded parts of Mexico City , the nation 's capital .

Up to 37,000 people nationwide have been affected , government officials said .

On Sunday , Mexican President Felipe Calderon toured Valle de Chalco , another city in Mexico state on the eastern outskirts of the Mexico City metro area .

National Water Commission Director Jose Luis Luege said Tuesday that contaminated water from a sewage network there that overflowed Friday will continue to flood the town for at least another 48 hours . The break in the sewage pipe had been fixed , but it burst again .

Officials also built two dikes to contain the sewage but were unable to use them out of concern that they would burst under the intense pressure from the floodwaters , Luege said .

`` It 's a very complicated operation , '' he said .

More than 3,000 homes in Valle de Chalco were flooded .

Mexico state is bordered on the west by Michoacan and adjoins Mexico City on three sides -- north , east and west .

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Most of deaths have been in Mexico 's eastern Michoacan state

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A dozen people missing after mudslides , Michoacan governor says

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Flooding has affected up to 37,000 people nationwide , officials say